diff --git a/src/js/game/components/item_ejector.js b/src/js/game/components/item_ejector.js
index 719925af..4ba4d27b 100644
--- a/src/js/game/components/item_ejector.js
+++ b/src/js/game/components/item_ejector.js
@@ -11,6 +11,7 @@ import { typeItemSingleton } from "../item_resolver";
  *    pos: Vector,
  *    direction: enumDirection,
  *    item: BaseItem,
+ *    lastItem: BaseItem,
  *    progress: number?,
  *    cachedDestSlot?: import("./item_acceptor").ItemAcceptorLocatedSlot,
  *    cachedBeltPath?: BeltPath,
@@ -67,6 +68,7 @@ export class ItemEjectorComponent extends Component {
                 pos: slot.pos,
                 direction: slot.direction,
                 item: null,
+                lastItem: null,
                 progress: 0,
                 cachedDestSlot: null,
                 cachedTargetEntity: null,
@@ -131,6 +133,7 @@ export class ItemEjectorComponent extends Component {
             return false;
         }
         this.slots[slotIndex].item = item;
+        this.slots[slotIndex].lastItem = item;
         this.slots[slotIndex].progress = 0;
         return true;
     }
diff --git a/src/js/game/hud/hud.js b/src/js/game/hud/hud.js
index f35fe018..e3ce76e6 100644
--- a/src/js/game/hud/hud.js
+++ b/src/js/game/hud/hud.js
@@ -189,6 +189,7 @@ export class GameHUD {
             "colorBlindHelper",
             "changesDebugger",
             "minerHighlight",
+            "shapeTooltip",
         ];
 
         for (let i = 0; i < partsOrder.length; ++i) {
diff --git a/src/js/game/hud/parts/shape_tooltip.js b/src/js/game/hud/parts/shape_tooltip.js
new file mode 100644
index 00000000..e84edcef
--- /dev/null
+++ b/src/js/game/hud/parts/shape_tooltip.js
@@ -0,0 +1,129 @@
+import { DrawParameters } from "../../../core/draw_parameters";
+import { createLogger } from "../../../core/logging";
+import { Vector } from "../../../core/vector";
+import { enumMouseButton } from "../../camera";
+import { Entity } from "../../entity";
+import { KEYMAPPINGS } from "../../key_action_mapper";
+import { BaseHUDPart } from "../base_hud_part";
+
+const logger = createLogger("hud/mass_selector");
+
+export class HUDShapeTooltip extends BaseHUDPart {
+    createElements(parent) {}
+
+    initialize() {
+        /** @type {Vector} */
+        this.currentTile = null;
+
+        /** @type {Entity} */
+        this.currentEntity = null;
+
+        /** @type {Array<import("../../../core/global_registries").BaseItem>} */
+        this.cachedItems = null;
+
+        this.isPlacingBuilding = false;
+        this.active = false;
+
+        this.root.camera.movePreHandler.add(this.onMouseMove, this);
+
+        const keyActionMapper = this.root.keyMapper;
+
+        keyActionMapper.getBinding(KEYMAPPINGS.placement.pipette).add(this.clear, this);
+
+        this.root.hud.signals.pasteBlueprintRequested.add(this.clear, this);
+        this.root.hud.signals.selectedPlacementBuildingChanged.add(
+            this.onSelectedPlacementBuildingChanged,
+            this
+        );
+        this.root.hud.signals.buildingsSelectedForCopy.add(this.clear, this);
+        this.root.signals.entityQueuedForDestroy.add(this.clear, this);
+        this.root.signals.editModeChanged.add(this.clear, this);
+    }
+
+    update() {
+        // need to make sure not to show when anything else is active
+
+        this.active =
+            this.currentTile &&
+            !this.isPlacingBuilding &&
+            this.root.keyMapper.getBinding(KEYMAPPINGS.ingame.showShapeTooltip).pressed &&
+            !this.root.hud.parts.massSelector.currentSelectionStartWorld &&
+            this.root.hud.parts.massSelector.selectedUids.size < 1;
+    }
+
+    /**
+     *  Called when the selected meta building was changed
+     * @param {import("../../../core/global_registries").MetaBuilding} metaBuilding
+     */
+    onSelectedPlacementBuildingChanged(metaBuilding) {
+        if (metaBuilding) {
+            this.isPlacingBuilding = true;
+            this.clear();
+        } else {
+            this.isPlacingBuilding = false;
+        }
+    }
+
+    /**
+     * Clears everything
+     */
+    clear() {
+        this.currentTile = null;
+        this.currentEntity = null;
+        this.cachedItems = null;
+    }
+
+    /**
+     * mouse move pre handler
+     * @param {Vector} pos
+     */
+    onMouseMove(pos) {
+        const newTile = this.root.camera.screenToWorld(pos.copy()).toTileSpace();
+
+        if (!(this.currentTile && newTile.equals(this.currentTile))) {
+            this.currentTile = newTile;
+
+            const entity = this.root.map.getLayerContentXY(
+                this.currentTile.x,
+                this.currentTile.y,
+                this.root.currentLayer
+            );
+
+            if (!(entity && entity.components.ItemProcessor && entity.components.ItemEjector)) {
+                this.clear();
+                return;
+            }
+
+            this.currentEntity = entity;
+        }
+    }
+
+    /**
+     *
+     * @param {DrawParameters} parameters
+     */
+    draw(parameters) {
+        if (this.active && this.currentEntity) {
+            const ejectorComp = this.currentEntity.components.ItemEjector;
+            const staticComp = this.currentEntity.components.StaticMapEntity;
+
+            for (let i = 0; i < ejectorComp.slots.length; ++i) {
+                const slot = ejectorComp.slots[i];
+
+                if (!slot.lastItem || slot.lastItem._type != "shape") {
+                    continue;
+                }
+
+                /** @type {Vector} */
+                let drawPos = null;
+                if (ejectorComp.slots.length == 1) {
+                    drawPos = staticComp.getTileSpaceBounds().getCenter().toWorldSpace();
+                } else {
+                    drawPos = staticComp.localTileToWorld(slot.pos).toWorldSpaceCenterOfTile();
+                }
+
+                slot.lastItem.drawItemCenteredClipped(drawPos.x, drawPos.y, parameters, 25);
+            }
+        }
+    }
+}
diff --git a/src/js/game/key_action_mapper.js b/src/js/game/key_action_mapper.js
index 41208d13..090b8b83 100644
--- a/src/js/game/key_action_mapper.js
+++ b/src/js/game/key_action_mapper.js
@@ -32,6 +32,8 @@ export const KEYMAPPINGS = {
         toggleFPSInfo: { keyCode: 115 }, // F4
 
         switchLayers: { keyCode: key("E") },
+
+        showShapeTooltip: { keyCode: 18 }, // ALT
     },
 
     navigation: {
diff --git a/src/js/game/modes/puzzle.js b/src/js/game/modes/puzzle.js
index c953b0a6..cdbc16cc 100644
--- a/src/js/game/modes/puzzle.js
+++ b/src/js/game/modes/puzzle.js
@@ -8,6 +8,7 @@ import { enumGameModeTypes, GameMode } from "../game_mode";
 import { HUDPuzzleBackToMenu } from "../hud/parts/puzzle_back_to_menu";
 import { HUDPuzzleDLCLogo } from "../hud/parts/puzzle_dlc_logo";
 import { HUDMassSelector } from "../hud/parts/mass_selector";
+import { HUDShapeTooltip } from "../hud/parts/shape_tooltip";
 
 export class PuzzleGameMode extends GameMode {
     static getType() {
@@ -32,6 +33,7 @@ export class PuzzleGameMode extends GameMode {
             puzzleBackToMenu: HUDPuzzleBackToMenu,
             puzzleDlcLogo: HUDPuzzleDLCLogo,
             massSelector: HUDMassSelector,
+            shapeTooltip: HUDShapeTooltip,
         };
 
         this.zoneWidth = data.zoneWidth || 8;
diff --git a/translations/base-en.yaml b/translations/base-en.yaml
index 02d8e948..cc4d5e94 100644
--- a/translations/base-en.yaml
+++ b/translations/base-en.yaml
@@ -1363,6 +1363,8 @@ keybindings:
         placeMultiple: Stay in placement mode
         placeInverse: Invert automatic belt orientation
 
+        showShapeTooltip: Show shape output tooltip
+
 about:
     title: About this Game
     body: >-